Question

How to remove a subarray from an array in Java

Answer 1

import java.util.Arrays;

public class Main {
    public static int[] removeSubarray(int[] array, int start, int end) {
        int[] firstPart = Arrays.copyOfRange(array, 0, start);
        int[] secondPart = Arrays.copyOfRange(array, end + 1, array.length);

        // Combine the two parts
        int[] result = new int[firstPart.length + secondPart.length];
        System.arraycopy(firstPart, 0, result, 0, firstPart.length);
        System.arraycopy(secondPart, 0, result, firstPart.length, secondPart.length);

        return result;
    }
    public static void main(String[] args) {
        int[] array = {1, 2, 3, 4, 5, 6, 7, 8};
        int start = 2, end = 4;

        int[] result = removeSubarray(array, start, end);
        System.out.println(Arrays.toString(result)); 
    }
}

 
 
/*
run:
 
[1, 2, 6, 7, 8]
 
*/

 

70+ SQL courses for beginners and professionals

Answer 2

import java.util.Arrays;

public class Main {
    public static int[] removeSubarray(int[] array, int start, int end) {
        int newLength = array.length - (end - start + 1);
        int[] result = new int[newLength];
    
        // Copy elements before the start index
        System.arraycopy(array, 0, result, 0, start);
    
        // Copy elements after the end index
        System.arraycopy(array, end + 1, result, start, array.length - end - 1);
    
        return result;
    }
    public static void main(String[] args) {
        int[] array = {1, 2, 3, 4, 5, 6, 7, 8};
        int start = 2, end = 4;

        int[] result = removeSubarray(array, start, end);
        System.out.println(Arrays.toString(result)); 
    }
}

 
 
/*
run:
 
[1, 2, 6, 7, 8]
 
*/

 

70+ SQL courses for beginners and professionals